SU111915A1 - A device for two-wire communication between the substation and the city PBX - Google Patents

Description

Subject t of the invention is a device for implementing two-wire communication between the substation and the urban exchange.

The known substation schemes provide for powering the subscriber unit's microtelephone from the power sources installed at the substation.

In the described two-wire communication scheme between the substation and the city PBX, in order to simplify the block-supply scheme, the microphones of subscribers included in the substation are powered from the devices of the city PBX.

The invention is illustrated in FIG.,, On KOTOpoii, a skeleton diagram of RSL sets (relay connecting line) of an outgoing communication from a substation to an exchange is shown.

Fig. 2 depicts a portion of the electrical circuitry of the RSL kits of the incoming communication from the exchange to the substation.

The connection between substation I and ATS II is carried out via two wires: connecting lines III for one-way operation, Two-wire 1e LPP1P1 are included in the RSL sets, Instruments are closed by looping the wires, and the release is transmitted with the help of cable reversal. During a conversation, in the RSL kits located at the substation, the OP relay is connected between the speaker wires with a DGT diode. In this case, the diode VC is read in such a way that the relay OP does not work during the conversation, but would be triggered at the moment the switch

And descend from 3 to 3 (fig, 1)

In the initial position, the control high-resistance relay K of substation 1 is energized. Consistently with relay K, relay L is turned on for PBX II, but the latter does not work, since the current in the circuit is insufficient.

The set of RSL substation I is occupied when the YAR relay is activated along the circuit; wire C, relay contacts Of}, K., relay PR, minus battery. The PR relay, triggered, connects the contact pr. Linear (spoken) wires to the station part,

turning off simultaneously the control relay, and the contact /.р- creates the day of holding for the PR relay. When you call, as a result of subscriber's closure, the subscriber's device will trigger the relay A through line n but value it: minus, nerve, relay A winding, contacts in, o-, pr, line III, substation I, annotate of subscription IV substation I, line III, Oz, VO2 contacts, second relay coil / 1 and ground. The relay OR does not work in this case, since the DGT diode is turned on at its value.

Relay A, triggered 1) 1v, contact ai switches on relay O at PBX P. By contact 01 a tripping circuit is created for the relay VO.

  the subscriber of the relay number A pulsates and transmits pulses to the PBX devices.

At the same time, the relay O keeps its measles in a tightened state, as it is slowed to release.

When sampling as a result of a break in the subscriber loop, relay A releases its measles.

Contact Al terminates the relay circuit O, which with contacts o- and oz overplugs the line wires, and with contact oi it opens the circuit of the relay VO.

From the polarity of power supply transmitted by wires a and b, it is triggered at the substation I of the relay О.Р and the contact op opens the relay circuit PR.

The PR relay, the output, the pr contact, again turns on the control relay f, which cannot operate until it releases the delayed VO relay, since this is prevented by the DGT diode. After releasing the VO relay, the K relay is triggered, and the kit is restored for a new job.

Sign In connection (Fig. 2)

Occupation of the RSL set of incoming communication on the PBX II takes place via a wire with through the KI contact. Relay / C is energized. The test circuit triggers relay O and contacts o switches VO, contacts O and Oz disconnects relay K from spoken wires and connects relay W to PBX P. Repeatedly with relay W to substation I, it activates 1) 1.

Contact 31 turns on the VP relay at substation 1, contacts ai turns on the VS relay at PBX II, and contact 0-1 creates a hold circuit after Bin.

From nostunyuigkh dial-up pulses, an AND relay is triggered at PBX P, while contact HI interrupts W circuit on PBX I and the relay circuit 3 pa nstuppatsii I, contact closes the trigger circuit of the serial C relay on I.

Relay C, triggered, by contact 6 shunts the first winding of relay W, and contact C turns on the second winding of relay W to improve the mode of transmission of pulses.

At substation 1, pulses are received by relay 3, which is released in time to the operation of the relay I at the district PBX P and transmits them via contacts 32 to the pulse reception and counting circuit V (Fig. 2). After the set of all series of pulses is completed, a single pulse is transmitted from this circuit to activate the VC relay, which holds via the contacts opi and SK-I.

Relay 5 / ((by operating with contacts on and off) switches off relay 3 at substation I and relay W at PBX P, and contact bkz closes the circuit of operation of relay I, substation, with which the subscriber's device is tested.

After the relay 3 is lowered, the VP relay slowly slows down, and after the W relay, which has a lower deceleration than the VP relay, is released, the CA relay and the SAT relay at PBX P connect to the signals of the Sh2 and Shz contacts via the eiui and Vshz contacts .

If the subscriber's unit is free, then the c wire is triggered at the substation of relay P, which blocks the subscriber’s line, and the contact L1 switches the positive pole of the battery onto wire 6 via the ct pin. This activates the saturation relay on the PBX, which disconnects from the b wire and blocks through the contacts 03 and sbz. The contacts of sat and sb wires a t b are connected to the call and answer circuits.

Relay OP when making a call does not work.

If the subscriber's line is busy, then the relay I will not work at the substation; after releasing the relay W to the PBX, the relay CA will operate, the holding circuit of which is created through the contacts On and cai.

Contact CQ2 puts the buzzer on to the buzzer in the relay's buzzer and for transmitting the signal to the subscriber.

The end call occurs when the relay O is broken along the wire from the PBX, while the contact oi interrupts the slow circuit to release the relay BO, and the contacts 02 and oz connect the reverse polarity of the battery to the wires a and b.

When “reclosing the line wires, the relay OP is activated and the contact opi interrupts the VK relay circuit. After releasing the relay VC and VO with contacts Vc, vkg, in and eoi, the circuit for relay A / C and

The kit is being prepared for a new job.

Subject invention

A device for performing two-wire communication between the substation and the urban PBX, characterized in that, in order to simplify the block supply scheme and power the microphones of the subscribers included in the substation, from the PBX devices in the outgoing and incoming sets of the RSL substation between conversational ; wires are connected to a relay connected in series with a diode, triggered when the output current is changed and the polarity of the supply current, in addition, the control relay connected in series with the diode is turned on in the outgoing RSL set between the speaker wires, and the same relay without a diode is similarly connected to the PBX.

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